Mobile accordion menus problems

Hello,
I have a few problems I’d like to solve with the mobile accordion menus on Customizr.
1. When I design a menu with for example a green background and white font, it works well for the desktop version. However once converted into the accordion mobile menu, the background unfolding behind each menu items is white. It partly cover the colour I’ve designed for the background AND make any white font menu become invisible. How to change those settings? Is it not possible to get ride of the white background behind each menu items?
2. On many pages the 3 lines of the accordion menu becomes one line instead, harder to spot. Any idea why? It works well on the frontpage
3. Is there a way to NOT have the menu converted as an accordion on mobile/tablets, and instead have a smaller opened version of my main menu?

Thanks!

The page I need help with: [log in to see the link]